| Richard Carrington, C.E.T. | 1993-1995 | Trow Associates Inc. |
| Gilbert McIntee, P. Eng. | 1995-1997 | St. Lawrence Testing & Inspection Co. Ltd. |
| Stephen Walker, P. Eng. | 1997-2000 | Paterson Group Consulting Engineers |
| Michael Maher, Ph.D., P. Eng. | 2000-2002 | Golder Associates Ltd. |
| Barry Loescher, Ph.D. | 2002-2004 | Bureau Véritas Laboratories |
| Matthew Julien, P. Eng. | 2004-2006 | Terraprobe Testing Ltd. |
| Rob Deverall (Deceased) | 2006-2009 | ALS Laboratory Group |
| David Hope, PChem. | 2009-2011 | Pacific Rim Laboratories Inc. |
| Alnoor (Al) Nathoo, P. Eng. | 2011-2013 | Peto MacCallum Ltd. |
| Jeffrey Pike | 2013-2015 | ALS Laboratory Group |
| Gordon H. Leaman, P. Eng. | 2015-2019 | Stantec Consulting Ltd. |
| Tony Araujo | 2019-2021 | Paragon Systems |
| Trevor Gluck, P. Eng. | 2021-2023 | WSP E&I Canada Limited |
| Doug Otto, C.E.T. | 2023-2025 | TBT Engineering Consulting Group |
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